I have been working on my upgrade for the last month or so, I currently have a 55g that has been running for 23 months. I came across a 140g tall with a built in 30g sump in the back part of the tank. I will be drilling the last chamber down to a 55g sump/fuge. The tank measures 5'x18"30". I am building a custom stand as well as a canopy for this tank to make it just the way I want it. I have collected all my equipment including new lights, new koralia's with the digital controller, and a new skimmer. The rest of my current equipment will be able to work with the change. I will keep posting as my upgrade progresses.